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FillFullFrom

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This commit is contained in:
Darien Raymond 2016-12-05 17:05:47 +01:00
parent 10b75e8961
commit 186bf1f141
No known key found for this signature in database
GPG Key ID: 7251FFA14BB18169
4 changed files with 40 additions and 37 deletions
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9
common/alloc/buffer.go
View File

@ -220,7 +220,14 @@ func (b *Buffer) Read(data []byte) (int, error) {
func (b *Buffer) FillFrom(reader io.Reader) (int, error) {
begin := b.Len()
nBytes, err := reader.Read(b.head[b.offset+begin:])
b.Value = b.head[:b.offset+begin+nBytes]
b.Value = b.head[b.offset : b.offset+begin+nBytes]
return nBytes, err
}
func (b *Buffer) FillFullFrom(reader io.Reader, amount int) (int, error) {
begin := b.Len()
nBytes, err := io.ReadFull(reader, b.head[b.offset+begin:b.offset+begin+amount])
b.Value = b.head[b.offset : b.offset+begin+nBytes]
return nBytes, err
}

9
proxy/shadowsocks/ota.go
View File

@ -71,8 +71,8 @@ func (v *ChunkReader) Release() {
}
func (v *ChunkReader) Read() (*alloc.Buffer, error) {
buffer := alloc.NewBuffer()
if _, err := io.ReadFull(v.reader, buffer.BytesTo(2)); err != nil {
buffer := alloc.NewBuffer().Clear()
if _, err := buffer.FillFullFrom(v.reader, 2); err != nil {
buffer.Release()
return nil, err
}
@ -84,11 +84,12 @@ func (v *ChunkReader) Read() (*alloc.Buffer, error) {
buffer.Release()
buffer = alloc.NewLocalBuffer(int(length) + 128)
}
if _, err := io.ReadFull(v.reader, buffer.BytesTo(int(length))); err != nil {
buffer.Clear()
if _, err := buffer.FillFullFrom(v.reader, int(length)); err != nil {
buffer.Release()
return nil, err
}
buffer.Slice(0, int(length))
authBytes := buffer.BytesTo(AuthSize)
payload := buffer.BytesFrom(AuthSize)

42
proxy/shadowsocks/protocol.go
View File

@ -28,11 +28,11 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
}
account := rawAccount.(*ShadowsocksAccount)
buffer := alloc.NewLocalBuffer(512)
buffer := alloc.NewLocalBuffer(512).Clear()
defer buffer.Release()
ivLen := account.Cipher.IVSize()
_, err = io.ReadFull(reader, buffer.Bytes()[:ivLen])
_, err = buffer.FillFullFrom(reader, ivLen)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read IV.")
}
@ -52,8 +52,8 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
Command: protocol.RequestCommandTCP,
}
lenBuffer := 1
_, err = io.ReadFull(reader, buffer.Bytes()[:1])
buffer.Clear()
_, err = buffer.FillFullFrom(reader, 1)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read address type.")
}
@ -73,53 +73,47 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
switch addrType {
case AddrTypeIPv4:
_, err := io.ReadFull(reader, buffer.BytesRange(lenBuffer, lenBuffer+4))
_, err := buffer.FillFullFrom(reader, 4)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read IPv4 address.")
}
request.Address = v2net.IPAddress(buffer.BytesRange(lenBuffer, lenBuffer+4))
lenBuffer += 4
request.Address = v2net.IPAddress(buffer.BytesFrom(-4))
case AddrTypeIPv6:
_, err := io.ReadFull(reader, buffer.BytesRange(lenBuffer, lenBuffer+16))
_, err := buffer.FillFullFrom(reader, 16)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read IPv6 address.")
}
request.Address = v2net.IPAddress(buffer.BytesRange(lenBuffer, lenBuffer+16))
lenBuffer += 16
request.Address = v2net.IPAddress(buffer.BytesFrom(-16))
case AddrTypeDomain:
_, err := io.ReadFull(reader, buffer.BytesRange(lenBuffer, lenBuffer+1))
_, err := buffer.FillFullFrom(reader, 1)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read domain lenth.")
}
domainLength := int(buffer.Bytes()[lenBuffer])
lenBuffer++
_, err = io.ReadFull(reader, buffer.BytesRange(lenBuffer, lenBuffer+domainLength))
domainLength := int(buffer.BytesFrom(-1)[0])
_, err = buffer.FillFullFrom(reader, domainLength)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read domain.")
}
request.Address = v2net.DomainAddress(string(buffer.BytesRange(lenBuffer, lenBuffer+domainLength)))
lenBuffer += domainLength
request.Address = v2net.DomainAddress(string(buffer.BytesFrom(-domainLength)))
default:
return nil, nil, errors.New("Shadowsocks|TCP: Unknown address type: ", addrType)
}
_, err = io.ReadFull(reader, buffer.BytesRange(lenBuffer, lenBuffer+2))
_, err = buffer.FillFullFrom(reader, 2)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read port.")
}
request.Port = v2net.PortFromBytes(buffer.BytesRange(lenBuffer, lenBuffer+2))
lenBuffer += 2
request.Port = v2net.PortFromBytes(buffer.BytesFrom(-2))
if request.Option.Has(RequestOptionOneTimeAuth) {
authBytes := buffer.BytesRange(lenBuffer, lenBuffer+AuthSize)
_, err = io.ReadFull(reader, authBytes)
actualAuth := authenticator.Authenticate(nil, buffer.Bytes())
_, err := buffer.FillFullFrom(reader, AuthSize)
if err != nil {
return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read OTA.")
}
actualAuth := authenticator.Authenticate(nil, buffer.BytesTo(lenBuffer))
if !bytes.Equal(actualAuth, authBytes) {
if !bytes.Equal(actualAuth, buffer.BytesFrom(-AuthSize)) {
return nil, nil, errors.New("Shadowsocks|TCP: Invalid OTA")
}
}

17
proxy/socks/protocol/socks.go
View File

@ -185,10 +185,10 @@ type Socks5Request struct {
}
func ReadRequest(reader io.Reader) (request *Socks5Request, err error) {
buffer := alloc.NewLocalBuffer(512)
buffer := alloc.NewLocalBuffer(512).Clear()
defer buffer.Release()
_, err = io.ReadFull(reader, buffer.Value[:4])
_, err = buffer.FillFullFrom(reader, 4)
if err != nil {
return
}
@ -206,17 +206,18 @@ func ReadRequest(reader io.Reader) (request *Socks5Request, err error) {
return
}
case AddrTypeDomain:
_, err = io.ReadFull(reader, buffer.Value[0:1])
buffer.Clear()
_, err = buffer.FillFullFrom(reader, 1)
if err != nil {
return
}
domainLength := buffer.Value[0]
_, err = io.ReadFull(reader, buffer.Value[:domainLength])
domainLength := int(buffer.Byte(0))
_, err = buffer.FillFullFrom(reader, domainLength)
if err != nil {
return
}
request.Domain = string(append([]byte(nil), buffer.Value[:domainLength]...))
request.Domain = string(buffer.BytesFrom(-domainLength))
case AddrTypeIPv6:
_, err = io.ReadFull(reader, request.IPv6[:])
if err != nil {
@ -227,12 +228,12 @@ func ReadRequest(reader io.Reader) (request *Socks5Request, err error) {
return
}
_, err = io.ReadFull(reader, buffer.Value[:2])
_, err = buffer.FillFullFrom(reader, 2)
if err != nil {
return
}
request.Port = v2net.PortFromBytes(buffer.Value[:2])
request.Port = v2net.PortFromBytes(buffer.BytesFrom(-2))
return
}